#!/bin/zsh -f

case $1 in
    m4a)
        for song in *.m4a ;
        do
            NEW=`basename -- "$song" .m4a`.ogg
            if [[ -e $NEW ]] ; then
	        echo "Skipping ${NEW}, already converted."
            else
                faad -w -- "$song" | oggenc -o "${NEW}" -
            fi
        done
        ;;
    mp3)
        for song in *.mp3 ;
        do
            NEW=`basename -- "$song" .mp3`.ogg
            if [[ -e $NEW ]] ; then
	        echo "Skipping ${NEW}, already converted."
            else
                sox ${song} ${NEW}
            fi
        done
        ;;
    *)
        echo Nothing to do
esac